CVE-2026-23464

Description

In the Linux kernel, the following vulnerability has been resolved: soc: microchip: mpfs: Fix memory leak in mpfs_sys_controller_probe() In mpfs_sys_controller_probe(), if of_get_mtd_device_by_node() fails, the function returns immediately without freeing the allocated memory for sys_controller, leading to a memory leak. Fix this by jumping to the out_free label to ensure the memory is properly freed. Also, consolidate the error handling for the mbox_request_channel() failure case to use the same label.

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* - VULNERABLE

Linux Kernel < Commit 17c84fb7cf3971cc621646185d785670e9530ca1

Linux Kernel < Commit 5a741f8cc6fe62542f955cd8d24933a1b6589cbd

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

/*
 * Conceptual PoC for CVE-2026-23464 Memory Leak
 * This snippet demonstrates the vulnerable logic in mpfs_sys_controller_probe.
 */

#include <linux/errno.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>

struct mpfs_sys_controller {
    int dummy;
};

// Simulating the vulnerable function logic
static int vulnerable_probe(struct device *dev) {
    struct mpfs_sys_controller *sys_controller;

    // Step 1: Allocate memory
    sys_controller = kzalloc(sizeof(*sys_controller), GFP_KERNEL);
    if (!sys_controller)
        return -ENOMEM;

    // Step 2: Call function that might fail
    // of_get_mtd_device_by_node returns NULL or error here
    if (!of_get_mtd_device_by_node(dev->of_node)) {
        // VULNERABILITY: Returns immediately without freeing sys_controller
        return -ENODEV; 
    }

    // Normal cleanup...
    kfree(sys_controller);
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-23464
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-23464
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-23464/
[4] VulDB https://vuldb.com/cve/CVE-2026-23464
[5] https://git.kernel.org/stable/c/17c84fb7cf3971cc621646185d785670e9530ca1
[6] https://git.kernel.org/stable/c/5a741f8cc6fe62542f955cd8d24933a1b6589cbd
[7] https://git.kernel.org/stable/c/da4b44c42f40501db35f5d0a6243708a061490a0
[8] https://git.kernel.org/stable/c/e3dd5cffba07de6574165a72851471cd42cc6d15

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-23464", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-04-03T16:16:33.697", "lastModified": "2026-05-20T15:18:39.457", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsoc: microchip: mpfs: Fix memory leak in mpfs_sys_controller_probe()\n\nIn mpfs_sys_controller_probe(), if of_get_mtd_device_by_node() fails,\nthe function returns immediately without freeing the allocated memory\nfor sys_controller, leading to a memory leak.\n\nFix this by jumping to the out_free label to ensure the memory is\nproperly freed.\n\nAlso, consolidate the error handling for the mbox_request_channel()\nfailure case to use the same label."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-401"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.78", "matchCriteriaId": "70EDBB86-A33A-44D8-BF14-B806E56D3529"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.20", "matchCriteriaId": "E5571059-6552-48E7-9BEF-3E358C387171"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.10", "matchCriteriaId": "96D34333-38BE-4414-9E79-6EB764329581"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/17c84fb7cf3971cc621646185d785670e9530ca1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/5a741f8cc6fe62542f955cd8d24933a1b6589cbd", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/da4b44c42f40501db35f5d0a6243708a061490a0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/e3dd5cffba07de6574165a72851471cd42cc6d15", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}